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Cloud Computing

Cloud Computing. Cloud Computing defined. Dynamically scalable, device-independent and task-centric computing resources are provided online, with all charges being on a usage basis. Cloud Computing. Online accessible applications, processing power and/or storage provided to clients on demand

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Cloud Computing

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  1. Cloud Computing

  2. Cloud Computing defined • Dynamically scalable, device-independent and task-centric computing resources are provided online, with all charges being on a usage basis.

  3. Cloud Computing • Online accessible applications, processing power and/or storage provided to clients on demand • Cloud = the Internet • Implementation details are abstracted from the users (s/w, h/w and infrastructure) • Servers (physical and/or virtual) are the basic component of the cloud

  4. CC Characteristics • Apps (s/w), processing power and storage (h/w) accessed on the Internet, online • Task-centric computing • Device/platform independent computing • Dynamically scalable, on-demand computing • Resources are available with variable, per-usage costs (not fixed)

  5. Coming a full circle • Centralized computing • Different than mainframe-based models of 1960s • Cloud is more distributed, reliable and larger scale • Because there are no fixed costs, cloud resources are more accessible to small companies

  6. Cloud computing suppliers • Zoho – CRM (customer relationship management), Email hosting, project management, etc. • Employease – HR, benefits, payroll • Salesforce – CRM, sales and customer service apps • Clarizen – project management and collaboration s/w

  7. 3 models of Cloud computing • Software as a Service (Saas) • Platform as a Service (Paas) • Infrastructure as a Service (Iaas), sometimes known as Hardware as a Service (Haas).

  8. SaaS • Running existing online applications. • Online productivity tools, including word processing, spreadsheet, presentation: GoogleDocs, Zoho, Microsoft) • creative web tools - Pixlr, Jaycut, Aviary • dedicated business applications: Salesforce, Employease, NetSuite . • Available for free or as a subscription service, accessible from any Internet client, facilitate collaboration. • The disadvantage is that they are not customized enough, too generic.

  9. PaaS • Environment and a set of tools to create online applications, • Google App Engine, Microsoft Windows Azure platform, VMWare vFabric, Force.com from Salesforce.com (Google and force.com are free). • Allows quick development of applications without much additional cost. • Can deploy applications privately or publicly. • Limits developers to an existing set of tools and languages and platform dependency.

  10. IaaS • Allows a business to run their own applications on the cloud hw without investing in its own hw infrastructure. • Cloud suppliers can use actual physical or virtual servers to host applications. • Amazon Elastic Compute Cloud (EC2) (rent virtual computers); Rackspace (private cloud and cloud hosting); GoGrit (cloud hosting, hybrid hosting, dedicated), VMWare vSphere

  11. 4 types of IaaS • Private cloud (certain physical servers are dedicated to one customer) • Dedicated hosting (customer rents physical servers on demand as needed) • Hybrid hosting (a mix of physical and virtual servers to reduce cost and increase flexibility) • Cloud Hosting (customer rents virtual servers on demand as needed, sometimes hourly).

  12. Iaas Categories

  13. Cloud concerns • Availability • Privacy • Data theft/loss • Security

  14. Case studies • Amazon Web Services • AWS Case Studies

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